Dump instruction trace for all error exceptions, not just illegal opcode

Wrap opcode execution with try-except to catch all ZCpuError subclasses except
ZCpuQuit and ZCpuRestart, which are normal control flow. This ensures we get
trace dumps for divide by zero, not implemented, and other errors.

src/mudlib/zmachine/zcpu.py

@@ -216,7 +216,15 @@ class ZCpu:
 
         # The returned function is unbound, so we must pass
         # self to it ourselves.
-        func(self, *operands)
+        try:
+            func(self, *operands)
+        except (ZCpuQuit, ZCpuRestart):
+            # Normal control flow - don't dump trace
+            raise
+        except ZCpuError:
+            # All other ZCpu errors - dump trace for debugging
+            self._dump_trace()
+            raise
         return True
 
     def run(self):